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从几何特征、构造样式、伸展和沉降历史、叠置方式、主控因素与动力学机制等方面对济阳坳陷不同凹陷结构演化的差异性进行了分析。认为凹陷的长轴与短轴比体现了盆地的演化程度,控制了中央隆起带的形成;构造样式类型的差异与距郯庐、兰聊断裂的距离有关,距离越近走滑构造样式越发育,距离越远伸展构造样式越发育;凹陷伸展强度、沉积中心具有从西南向东北迁移的趋势;凹陷早期形成的半地堑被晚期发育的伸展断陷/走滑断陷叠加、改造,地质结构复杂化;郯庐、兰聊2个走滑构造体系的活动,以及深部地幔物质的上涌和迁移控制了不同凹陷成因和结构的差异。
The differences in structural evolution of different sags in Jiyang Depression are analyzed from the aspects of geometry, tectonic style, history of extension and subsidence, overlying modes, main controlling factors and dynamic mechanism. It is considered that the ratio of major axis to minor axis of the depression shows the evolution of the basin and controls the formation of the central uplift zone. The difference of tectonic styles is related to the distance to Tanlu and Lanliao fault, and the closer the strike-slip tectonic style , And the farther away the extensional tectonic styles develop. The depression extension strength and sedimentary center have the tendency to migrate from southwest to northeast. The early half-graben formed in the depression was superimposed and reconstructed by the late developed extensional and strike-slip faults, and the geological structure The activities of the two strike-slip tectonics systems in Tanlu and Lanchao and the upwelling and migration of the deep mantle material control the differences in the causes and structures of different sags.